Spectrum Multiangular reflectance of glass basalt Ysson in 5 Vis bands (45-75 µm grain size) Spectrum Multiangular reflectance of glass basalt Ysson in 5 Vis bands (75-125 µm grain size) Spectrum Multiangular reflectance of glass basalt Ysson in 5 Vis bands (125-250 µm grain size) Spectrum Multiangular reflectance of glass basalt Ysson in 5 Vis bands (250-500 µm grain size) Spectrum Multiangular reflectance of glass basalt Ysson in 5 Vis bands (500-1000 µm grain size) Spectrum Multiangular reflectance of glass basalt Ysson in 5 Vis bands (1000-2000 µm grain size)